Guide · Cycle

The Cycle Phases Explained Simply – for Couples

The cycle is more than just “that time of the month”. It has a rhythm that can affect energy, mood and how the body feels. If you know this rhythm – both of you – a lot of everyday life makes more sense.

By Stefan Renzler · 11 October 2026 · approx. 5 min read

How long is a cycle?

The first day of the period is day 1 of a new cycle. You often read about 28 days – but that's only an average. According to the Austrian health portal, a cycle lasts between 24 and 38 days in many cases, and even for the same woman it can vary a little from month to month.

The whole thing is controlled by hormones from the brain and the ovaries. For everyday life you don't need to know every hormone. But a rough picture of what happens in which phase is helpful.

The four phases at a glance

Phase 1: Menstruation

The new cycle begins with bleeding. According to gesundheit.gv.at, it usually lasts three to seven days and is heaviest on the first two days. Many women feel more tired during this time, some have lower abdominal pain, others barely notice anything.

What you can do: Slow down where you can. For the partner, that often means taking things off her plate instead of asking whether to take things off her plate – while still being open if she'd rather carry on as normal.

Phase 2: Follicular phase

After bleeding, the lining of the uterus builds up again, and a follicle matures in the ovary. Oestrogen levels rise. Many women report feeling more energetic and adventurous during this time – but that's not a rule, just a common experience.

What you can do: When there's energy, this is often a good time for plans, outings or conversations about bigger topics.

Phase 3: Ovulation

A rise in the hormone LH triggers ovulation: a mature egg is released and, according to gesundheit.gv.at, can be fertilised for around 24 hours. Because sperm can survive for a few days, pregnancy is possible even a few days before ovulation. In a 28-day cycle, ovulation would be around day 14 – but it can shift even with a regular cycle. The NHS describes that for most women it happens about 10 to 16 days before the next period.

What you can do: If you're trying for a baby, this phase is often emotionally charged. Our article Trying to conceive without pressure goes into this in more detail.

Phase 4: Luteal phase

The ruptured follicle turns into the corpus luteum, which mainly produces progesterone. If fertilisation doesn't take place, it regresses after about ten to twelve days, hormone levels drop and the next bleed begins. According to gesundheit.gv.at, the second half of the cycle is relatively constant – variations in cycle length tend to arise in the first half.

PMS symptoms can also occur in this phase: tiredness, irritability, breast tenderness or a feeling that “everything is too much”. What you can do: Keep the calendar a bit emptier, be considerate without being patronising. More on this in PMS in a relationship.

Why generic tips are only a starting point

“Exercise in the follicular phase, sofa in the luteal phase” – rules of thumb like this are everywhere. They can offer some orientation, but every body reacts differently. One woman feels completely normal shortly before her period, another is exhausted a week before.

That's why it's worth recording your own observations: How was the energy, how was the mood, what did you good? After a few cycles, this builds a picture that is much more accurate than any general table. We also show how this works as a couple in Menopause as a couple – because that's when the cycle often becomes more irregular, and experience counts even more.

This article offers general information for everyday life and relationships. It does not provide a diagnosis and does not replace medical or psychological advice. If your symptoms are severe, please have them checked by a doctor. Ovulyx is not a medical device and not a method of contraception.